How would you use greater or equals by a certain amount?

How would you make it so that something is greater or equal by a certain amount?

if(Calendar_script.Year==2017)

if (detailsRegenyear1.cash1>detailsRegenyear1.debt1*(100,200))
detailsRegenyear1.RegenPrice1 +=40;

If you want X to be 100 or more larger than Y you do:

if (X - Y >= 100) {
    //X is 100 or more larger than Y
}